<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'">
    <link href="./styles.css" rel="stylesheet">
    <title>Custom Titlebar App</title>
  </head>
  <body>
	  <!-- mount your title bar at the top of you application's body tag -->
    <div class="titlebar">Cool titlebar</div>
  </body>
</html>